Ore-concentrator



I0, I919- I Patented Apr. 6, 1920.

2 SHEETS-SHEET l.

E; AND W. F. DEISTER.

ORE CONCENTRATOR.

APPLICATION FILED SEPT. 10, 1919.

Patented Apr. 6, 1920.

2 SHEETS-SHEET 2.

INVENTORS. 6111i? eia be)" 4 infir- ATTORNEY.

UNITED STAZ'IES PATENTOFFICE;

EMIL DEISTER AND WILLIAM F. DEISTEB, 0F FORT WAYNE, INDIANA ASSIGNORS- T0 DEISTER MACHINE COMPANY, OF FORT: WAYNE, INDIANA, A'CORPORATION.

'OR-E-CONCENTRATOR.

Specification of Letters Patent. Patented Apr. 6, 1920.

Application filed September 10, 1919. Serial No. 322,915.

To all whom it may concern Be it known that we, EMIL DEISTER and lVILLIAM F. Dnis'rnn, citizens of the United States, residing at Fort Wayne, in the county of Allen and State of Indiana, have invented new and useful Improvements in Ore-Concentrators, of which the following is a specification. 1

The invention relates to ore concentrators and particularly to such concentrators which are differentially reciprocated and transversely inclined downwardly and adapted especially for treating materials usually treated on jigs.

'The object of the invention is to provide a simple concentrating table which shall have large capacity and shall be highly efficient in operation and in delivering a finished product without the use of jigs and cleaning-up tables. Other objects and advantages will be set forth hereinafter.

In the accompanying drawings we have illustrated the invention in simple form in.

which- Figure 1 is a plan view of the deck of the table;

Fig. 2 a cross-sectional view on line 22 of Fig. 1;

' Fig. 3 a cross-sectional view on line 3-3 of Fig. 1;

Fig. 4 a cross-sectional view on line 4-4 of Fig. 1;

Fig. 5 a cross-sectional view on line 5-5 ofFig.1;and

Fig. 6 an enlarged view of a portion of the riflles.

Referring to the drawings, 10 indicates the deck of the table, 11 being the head or motion end of the deck, 12 the mineral discharge end, 13 the feed and dressing water side and 1 1 the tailings discharge side. Arrow 15 indicates the direction of differential reciprocation of the table. In the operating position of the deck it slopes transversely downward from the feed side to the tailings discharge side, the slope being relatively steep. The surface of the deck is formed in three coterminous sections which extend transversely across the same, their cotermiv nal lines or edges being oblique or diagonal to the line of reciprocation of the deck. Section at b 0 (Z extends along the head end of the deck, along a portion of the feed side and along the greater portionof the tailings discharge side of the deck. Section 0 d e f is adjacent section a 7) c d and extends from the feed side to the tailings discharge side of the deck and slopes upwardly fromsection (a Z) (2 cl to section 6 f g lathe latter section extending along the mineral discharge end of the deck and along the feed side from its juncture with section 0 d e f to the mineral discharge edge. Sections a bio d and e f g It are substantially horizontal in operating position in the line of reciprocation of the deck and section e f g it, the plateau, is elevated above section'a b c d with section 0 d e f connecting them. Section '0 d e f is substantially coincident at its forward corner with the corner of the table between the tailings discharge side and the mineral discharge edge.

Rifiles 16 are suitably secured to the deck over section a b c d with their tips extending onto section 0 d e f. The lowest rifiles 17 (two being illustrated) extend across sections 0 d e f and e f g h to the mineral discharge edge of the deck and riflies 18 next above riflles 17 extend to the rear edge of section 0 d c f. Riilies 16 are slightly ta-.

minates on section 0 d e f in the same diagonal line which passes through the tips of riiiles 16, and the cut-out portions are provided in riflies 16 so that the forward ends of rifiles 20 shall serve as additional riffles on section 0 d c f and substantially double the number of riflles on said section. All of the rifiles are diagonal to the line of reciprocation of the table and also diagonal to the transverse axis of the table or to the direction in which the materials fed onto the deck from feed box 21 will. flow under the influence of gravity. 22 indicates the dressing water box.

In operation, the deck is-adjusted with the proper transverse inclination downwardly. The materials are deposited on the deck from the feed box and tend to flow transversely across the deck under the influence of gravity. The heavier or coarser materials are caught by the riffles and the lighter materials pass over the same, more and more of the *heavier materials being captured by the riflies in succession. The differential reciprocating movement of the table causes the materials caught by the riflies to be advanced in the troughs or channels toward the mineral discharge edge of the deck. The heavier materials will collect in the trougl s adjacent the upper sides of the riffles and the lighter materials will. lie over the heavier materials and extend to the lower sides of the riiiies. As the materials are advanced in the troughs the lighter and finer materials reach the displacement riffles which elevate them so that they will be washed over to the riifles below, the washing-over action being progressive as the materials advance. The displacement riflies restrict the channels so that the waste materials must necessarily be forced. out of the troughs in succession down the slope, more and more of the minerals being caught by the riffies and delivered to the mineral discharge edge of the table. The concentrates pass out from the tips of the riflies and travel down section 0 (l e f in front of the riflle tips, riffies 18 causing them to pass onto the lower end of section 6 f g h from which they are delivered at the concentrates discharge edge of the deck. The wash water is deposited on sections 0 d e f and e f g h and flows down the slope toward the tailings discharge. The water meets the materials advancing in the troughs near the forward ends of the riifies and since the riffles are doubled in number along section 0 d e f the water has opportunity to wash out all gangue, which may be mixed with the concentrates, before the concentrates leave the rilfle tips, the finer concentrates which may be washed over any riifle with the gangue being caught by a rifl'le below and the gangue passing off the table at the tailings discharge.

The riffle channels are relatively deep and Wide rearwardly of the rear ends of rifiles 20, while forwardly of said ends of said rifiies 20 the channels are narrowed and gradually lessen in depth to the tips of the riflies. The diagonal arrangement of rifHes is very effective in catching the minerals and as the tips of the riflies are above the rear ends of the riffles, relatively to the transverse axis of the deck, the minerals are compelled to travel in the channels lip-hill, as it were, to the tips thereby affording effective work on the part of the wash water in cleaning up the minerals by washing the gangue or sands over the tapered riffles 16. The lowermost rifHes l7 catch any of the fine minerals which pass over the rifiles above them and conduct the same to the mineral discharge edge of the deck.

In Fig. 6 the construction of the riflies 16 is clearly shown, 16 indicatin the main riflies and 20 the displacement riiies.

We prefer to use rubber as a coverin for the deck of the table, as indicated in igs. 35, since it resists injury by the coarse materials passing over it in greater degree'than does linoleum and hence has longer life than, linoleum or an other covering for concentrator decks. he rifiies may also be formed of rubber since rubber has a longer life than wood Where the feed is coarse.

What we claim is:

' 1. In a differentially reciprocating concentrating table the combination of a deck having a plurality of coterminous sections on its surface which in operating position are inclined downwardly from the feed side to the tailings discharge side of the deck, one of the sections being inclined upwardly with respect to the longitudinal axis of the table, a series of main riflies on the deck having their forward ends terminating on the upwardly inclined section, and a series of displacement riflles in the channels between the main rifiles and abutting the lower sides of the main riffles and having their forward ends terminating on the upwardly inclined section, the forward portions of the main riflies being cut away to form channels between said riiiles and the corresponding portions of the displacement riflies.

2. In a differentially reciprocating table having 'its deck transversely inclined downwardly, a series of mainriflles on the deck and a series of displacement rifiles between the main riflies and abutting the lower sides of the main riffles.

In a differentially reciprocating concentrating table a deck having its surface inclined downwardly from the feed side to the tailings discharge side of the deck, a series of main rifiies on the deck and a series of displacement riflies between the main rifiles e and abutting the lower sides of the main riffles respectively, the forward portions of the main rifiies being cut away on their lower sides to form channels between said rifiies and the corresponding portions of the adjacent displacement riffies.

4. In a differentially reciprocating concentrating table a deck, a series of main riflies on the deck anda series of rifl'les between the main riffies and adjacent the lower sides of the main rifiles respectively, the lower sides of the main riflies being cut away at their forward ends to form channels between the main riflies and the second series of riflies at said forward ends. I

5. In a concentrating table a deck adapted to be differentially reciprocated, a series of main rifiles on the deck extending from the feed side to the tailings discharge side of the deck and diagonally arranged with respect to the line of reciprocation of the deck line diagonal to said line of reciprocation,

and a series of displacement riflles on the deck between the main riflies and abutting the sides of the main riflles which face the tailings discharge side of the deck, the forward ends of the displacement riflies terminating on said diagonal line of the terminals of the main riffies and the main riflles being cut out at their forward ends to form channels between the same and the displacement riflles adjacent thereto.

6. In a concentratin table a deck adapted to be reciprocated di erentially, a series of main riflles on the deck having their forward ends terminating in a line diagonal to the line of reciprocation of the deck and being tapered to gradually reduce the height thereof-fora portion of their length and a series of displacement rifiles in the channels between the main rifiles and abutting the sides of the main riflles which face the tailings discharge side of the deck and along the tapered portion thereof, the forward ends of the main riflles being laterally beveled to form channels between thesame and the displacement riflies, the forward ends of the dis placement riflles terminating in the diagonal line of the terminals of the main riflles.

In witness whereof we have hereunto 'sub- EMIL DEISTER. WILLIAM F. DEISTER. 

